ETH Zurich offers multiple wireless
networks around campus. Our local IT people drilled into me that I
should prefer to use the eth-5 SSID whenever possible. Obviously
I had to figure out a way to support this profile for netctl. If
you count yourself among the few, the happy few, the band of users
if this fine piece of software, here is what you have to do:

Create a new file /etc/netctl/WiFi_eth5

Paste the following file, while taking care to replace $USER
with your ETH username and $PASSWORD with your ETH network
password (this is not your regular login password; I am
talking about the other one), and $INTERFACE with the WiFi
interface, e.g. wlp4s0